Yes. But don't get scared. A Windows system's look and feel are determined by the OS itself: Windows defines what menu bars, scroll bars, dialogue boxes and so forth will look like. Linux doesn't provide such definitions - XFree86, the GUI architecture that ships with all Linux distributions, doesn't dictate the look and feel of the interface. Another piece of software, called a window manager, handles that job. The window manager you select (there are many) determines what your on-screen windows, menus and buttons look like, but it may not provide other features, such as a taskbar. Your desktop environment handles that.
The two main desktop environments currently vying for Linux supremacy are GNOME and KDE. Despite some differences in software architecture, both provide a taskbar, an application launcher resembling the Windows Start menu, and various applets (note-pad, calculator, CD player, and so on). Corel Linux OS and Caldera OpenLinux ship with KDE. RedHat Linux and Linux-Mandrake ship with both environments, but RedHat defaults to GNOME whereas Mandrake defaults to KDE.
Neither environment is superior. Both put a clean, straightforward interface on top of Linux - so most Windows users who have never seen Linux before can start to work right after the installation. Both the GNOME and KDE environments are open-source, collaborative efforts, and the development teams for each are striving to build free office applications that will one day be integral parts of their respective environments.